Jig-plunger.



' G. H. BLMUREv @L H. v. cRoLL.

JIG PLUNGER.

APPLIOATION FILED MARA, 1914.

Patented Aug. 25, 1914.

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G. H. ELMORE & H. V. CROLI..

JIG PLUNGER.

APPLICATION FILED MARA, 1914.

Patented Aug. 25, 1914.

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."G'U'l Il. ELMRE, F SW'AR'IllllVlORE, AND HORATIOYV. CROLL, 0F PHILADELPHIA,

` f IPEll'NSYfVANIA.

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l To all whom t may concern lSe known that we, GUY ll. Emmen, a :itizeu oit the United tltates, residing at tawarthniore, in the county of Delaware and State oit Pennsylvania, and llenarlo V.. Geom., a citizen of the -United Celtates, residing at Philadelphia, in the county of Philadelphia and State ot Pennsylvania, have invented certain new and useful linproyeinents in Jig-Plungers, et which the 'following is a specification.

this invention relates to plunger-s Ll'or jigs, and particulzn-ly to an inclosed driving and guiding mechanism ttor the saine. i

The purpose of the inycntion iste secure a simple right line guide tor the plunger,

` protect all the working parts troni water and grit, and secure constant and abundant lubrication.

nlhe invention .maybe ap ilied to any type `of jj lunger,"but is particularly adapted to use with so-ealled y'alvejiilungers, and is illustrated as applied to euch a plunger. ln this typeofplunger, the plungerl properl is smaller than the plunger compartment and is provided with"`a ilaring elastic valve tlap around its periphery. rllhs swings into sealing relation with the walls of the plunger compartment on the down stroke, and swings away trein said walls onthe upstrolie, the plxuiger proper being so guided as never to touch the walls of the compartment. rlhe best action et such plungers can only be secured by `g'iing theni a true and preferably vertical right line movement. rlhe desired result niay be secured by the use et the A ao iti

present invention.

Regardless oit the particular torni et the plunger withwhich it is used the use oit the invention eiltects a material saying in power and wear on the working parts.

rlhe invention will new be described in connection with the accompanying drawings, in which: j

Figure 1 is a T@Vertical section of the device on a plane transverse to the drive shaft; Fig. 2 is vertical arial section; 3 is a section en tl line 3-`-3 of Fig. il, illustrating the guide mechanism in detail; and Figs. l

and 5 are fragmentary views or" a inodiiied torni ot guide mechanism, 5 being a section on the line 5 5 oi Fig. d.

ln the drawings the plunger coinpartinent 1 of the jig is illustrated as furnished with bronze wear plates 2, mounted therein land `its connected case 5.

Specification of Letters Patent. g Patented Aug 25, 1914 Application filed March 4t, 1914-.

Serial No. 822,367.

approximately coextensiif'e with `the travel of the jig plunger. rlhe shape ot the plunger and its compartment is immaterial, a rectangular compartment being Aillustrated in the drawings. `The plunger i is sonlewliat smaller than the compartment and is provided witha flexible downwardly ijlaring rim or iange et, which is adapted to bear against i the wear plates 2 on the down stroke and swing clear thereof on the upstrolte of the plunger. The plungerl is guided in the conipartnient by the guide blochsMQll bolted to its upper face and bearing against the wear plates Q., as shown.` ln this way the plunger `is properly centered in the compartment so that the elastic valve flange will act eitectir/ely. i j

liolted to the upper side of `the plunger is a combined oil case and guide way 5 termed in two parte bolted 'together at 6, and inclosed at the top by a removable cap plate T. .At reino able threaded plug 8 is provided to permit the ready supplyingof oil` Vto the interior et the ci se.

` The main shaft 9 et the jig :is mounted in suitable bearings 10 and passes tlnough ver; ti tally elnngated apertures 1l Ifornied in oppesite sides of the ease 5, the length ot the ojzienings being sullicient to permit the desired vertical throw of the jigplunger, and rl`he apertures 1l are closed and in tact practically sealed in all positions ofthe. device by circular sealing plates .12, :tast on the shaft 9, and bearing against the ilatjsides ot the case 5, as shown. '.lfhus the case is free to nuove vertically with reference to the shaft 9, and yet is closed against the entrance oit water and grit.

The case 5 tilinear inotion by two guide members each comprising a. separable bearing 13 journaled on the shaft 9, together with straight guide bars 1li slidably mounted in vertical ways l5 within the ease 5, and preferably formed integral therewith. These bearings may be babbitted .as shown. As it is desirable to keep the level of oil contained by the case 5 below the lateral apertures therein, l prefer to use chain oil feeders 1G to assist in lubricating the bearings 13. Other well known terms of conveyer lubricator might be substituted or these might be wholly omitted. rlhe plunger 3 is reciprocated by an adjustable throw eccentric 17, eccentric rod 18 and wrist pin 19 all inclosed by the case 5, as

is constrained to vertical rec- CAD shown. The use of an adjustable throw eccent-ric is of course not essential but is desirable in this class of machines. The wrist pin 19 is inserted through the sides of the case 5 and is retained by screw plugs 20, which also prevent any leakage of oil from the case 5. If a sufficiently large eccentric is used it will dip into the oil contained in the case sufficiently to edect its proper lubrication, but in the case of small eccentrics this will not occur unless the oil level is unduly high. Consequently I prefer to add a forwardly extending lubricating tube 23 which is mounted onthe side of the eccentric 17 and projects beyond the eccentric strap. This tube is so arranged as to dip into the oil in the case and to conduct the same to the wearing surface of the eccentric.

The guides for case may assume different forms without substantial change of function. For example in Figs. ll and 5, we show a modified structure in which the case 5 carries guide ways 2l; between which slide bearing blocks 22 j ournaled on shaft 9. In the drawings the blocks 22 are shown constructed in halves to permit easy re moval. In Figs. 4L and 5 parts substantially identical with those in other figures are similarly numbered. Other obvious modications may be made such for example as the substitution of a crank for the eccentric shown and the use of different forms of case. Such modifications are intended to be included within the scope of our claims. YWe use the expression crank connections in the claims to denote generally the mechanical devices of the crank type; capable of converting rotary into positive reciprocating motion. Many such are known and their interchangeability is fully understood.

The use of guide member journaled on the shaft is of importance as it reduces noise and friction and prevents scoring and cutting of the shaft. If the casing were guided merely by the sliding of the shaft in the slots in the case the wear would be unduly rapid and the inherent looseness would cause noisy and otherwise unsatisfactory action.

Having thus described our invention, what we claim is l. In a jig the combination of a plunger casing or compartment; a plunger guided in said compartment; a hollow apertured oil .retaining shell rigidly connected to said plunger; guides within said shell and carried thereby; a rotatable drive shaft passing freely through the apertures in said shell; means for sealing said apertures around said shaft; while permitting motion of said shell transverse to said shaft; a guide member journaled on said shaft and running in the guides on said shell; and crank connections between said shaft and shell and wholly inclosed by the latter.

2. In a jig the combination of a plunger casing or compartment; a plunger guided in said compartment; a hollow apertured oil retaining shell rigidly connected to said plunger; guides within said shell and carried thereby; a rotatable drive shaft passing freely through the apertures in said shell; sealing plates carried by said. shaft and adapted to seal said apertures while permitting motion of said shell transverse to said shaft; a separable gnide member journaled on said shaft and guided in said guides on said shell; and an eccentric and rod connecting said shaft and shell and wholly inclosed by the latter.

3. In a the combination of a plunger casing or compartment; a plunger guided therein; a drive shaft; crank connections between said shaft and plunger; a guide meinber journaled on said shaft; and an oil retaining casing rigidly connected to the plunger, completely inclosing said lcrank connections and guided on said guide member to have a reciprocating motion transif'erse to said shaft and substantially coincident in direction with the motion of the plunger.

4. In a jig the combination of a plunger casing or compartment; a plunger guided therein; a drive shaft; crank connections between said shaft and plunger; a guide member journaled on said shaft; and a compleinentary guide rigidly mounted on said plunger and adapted to coact with the first named guide member to constrain said plunger to rectilinear motion.

In testimony whereof we have signed our names to this specification each in the presence of two subscribing witnesses.

GUY I-I. ELMORE. HORATIO V. CItGLL.

IWitnesses JULIA M. OBRIEN, litri-innen E. ZoLLIonorrnn.

copies of this patent may ne obtained for ve cents each, by addressing the Commissioner of Patents, Washington, D. C. 

